溧蓄电站堆石坝碾压激振力实时监控及振动压实质量评估研究
发布时间：2018-07-16 13:17
【摘要】：有效控制大坝填筑碾压施工质量是保证溧蓄堆石坝长期安全稳定运行的关键所在,而在大坝填筑过程中碾压参数(碾压机行走速度、激振力、碾压遍数和压实厚度)是影响坝体压实质量的重要因素。常规手段是采用人工旁站现场监控碾压参数与事后随机抽取试坑点检测的方法来控制堆石坝的压实质量,一方面人工监控误差较大、管理粗放,另一方面用有限个试坑点很难真实反映整个施工仓面的压实情况。本文在实验室已有研究的基础上,深入研究溧蓄堆石坝碾压激振力实时监控系统,以实现对碾压机激振力大小的直接监控。同时,为克服用有限个试坑点反映整个施工仓面压实情况的片面性,以及挖坑费时费力的弊端,研究溧蓄堆石坝料振动压实质量实时评估方法,以实现堆石坝碾压施工质量的快速、全面评估。本文主要研究内容和成果如下:(1)研制开发了溧蓄堆石坝碾压激振力实时监控系统,设计了系统的总体结构及其功能,实现了对碾压机激振力大小的监控与报警提示,并结合现场碾压进行了应用分析,为直接控制碾压机的激振力大小及保证碾压机的激振性能提供了新的技术手段。(2)利用实验室前期开发的溧蓄堆石坝料振动压实质量实时监控系统,实时采集碾压施工过程中的压实质量监测值(CV),建立了溧蓄堆石坝料振动压实干密度评估的BP神经网络模型,并利用空间插值方法,可获得整个施工仓面任一位置点处的压实干密度和整个施工仓面的压实干密度达标率,实现了对施工区域压实质量的快速评估,为溧蓄堆石坝填筑碾压施工质量的控制提供了参考。
[Abstract]:Effective control of the quality of dam filling roller compaction is the key to ensure the long-term safe and stable operation of Li-Li rockfill dam, and the roller compaction parameters (rolling speed, exciting force) are used in dam filling process. The number of compaction times and compaction thickness are the important factors affecting the compaction quality of dam body. The conventional method is to control the compaction quality of rockfill dam by using the methods of monitoring rolling parameters on the spot and random sampling of test points afterwards. On the one hand, the manual monitoring error is large, and the management is extensive. On the other hand, it is difficult to truly reflect the compaction of the whole construction silo with a limited number of test pit points. Based on the existing research in the laboratory, this paper deeply studies the real-time monitoring system of roller compaction excitation force of Li-Li rockfill dam, in order to realize the direct monitoring of the exciting force of roller compactor. At the same time, in order to overcome the one-sidedness of the finite number of test points reflecting the compaction of the whole construction silo surface and the time-consuming and laborious drawback of excavating the pit, the real-time evaluation method for the vibratory compaction quality of Li-Li rockfill dam is studied. In order to realize the rapid and comprehensive evaluation of the quality of rockfill dam roller compaction construction. The main contents and achievements of this paper are as follows: (1) the real time monitoring system of rolling excitation force of Li-Li rockfill dam is developed, the overall structure and function of the system are designed, and the monitoring and warning of the exciting force of roller compactor is realized. Combined with the field compaction, the application analysis was carried out. It provides a new technical means for directly controlling the exciting force of the roller and ensuring the exciting performance of the roller. (2) the real-time monitoring system for the vibratory compaction quality of the Li-li rockfill dam developed in the early stage of the laboratory is used. The monitoring value of compaction quality (CV) in the process of roller compaction construction is collected in real time. The BP neural network model for evaluating the dry density of vibratory compaction of Li-Li rockfill dam is established, and the spatial interpolation method is used. The compaction dry density at any point on the whole construction silo surface and the compaction dry density reached the standard rate of the whole construction silo surface can be obtained, and the rapid evaluation of the compaction quality in the construction area can be realized. It provides a reference for the quality control of filling roller compaction construction of Li-Li rockfill dam.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV641.4;TV698.1
本文编号：2126504
[Abstract]:Effective control of the quality of dam filling roller compaction is the key to ensure the long-term safe and stable operation of Li-Li rockfill dam, and the roller compaction parameters (rolling speed, exciting force) are used in dam filling process. The number of compaction times and compaction thickness are the important factors affecting the compaction quality of dam body. The conventional method is to control the compaction quality of rockfill dam by using the methods of monitoring rolling parameters on the spot and random sampling of test points afterwards. On the one hand, the manual monitoring error is large, and the management is extensive. On the other hand, it is difficult to truly reflect the compaction of the whole construction silo with a limited number of test pit points. Based on the existing research in the laboratory, this paper deeply studies the real-time monitoring system of roller compaction excitation force of Li-Li rockfill dam, in order to realize the direct monitoring of the exciting force of roller compactor. At the same time, in order to overcome the one-sidedness of the finite number of test points reflecting the compaction of the whole construction silo surface and the time-consuming and laborious drawback of excavating the pit, the real-time evaluation method for the vibratory compaction quality of Li-Li rockfill dam is studied. In order to realize the rapid and comprehensive evaluation of the quality of rockfill dam roller compaction construction. The main contents and achievements of this paper are as follows: (1) the real time monitoring system of rolling excitation force of Li-Li rockfill dam is developed, the overall structure and function of the system are designed, and the monitoring and warning of the exciting force of roller compactor is realized. Combined with the field compaction, the application analysis was carried out. It provides a new technical means for directly controlling the exciting force of the roller and ensuring the exciting performance of the roller. (2) the real-time monitoring system for the vibratory compaction quality of the Li-li rockfill dam developed in the early stage of the laboratory is used. The monitoring value of compaction quality (CV) in the process of roller compaction construction is collected in real time. The BP neural network model for evaluating the dry density of vibratory compaction of Li-Li rockfill dam is established, and the spatial interpolation method is used. The compaction dry density at any point on the whole construction silo surface and the compaction dry density reached the standard rate of the whole construction silo surface can be obtained, and the rapid evaluation of the compaction quality in the construction area can be realized. It provides a reference for the quality control of filling roller compaction construction of Li-Li rockfill dam.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV641.4;TV698.1
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